PENETRATION OF IRON PLATES BY STEEL SHOT. 427 



The fact^ however, of the 10'5 inch gun having failed to pierce this target, 

 indicates that the American smooth-bore 15-inch gun fired with solid steel 

 sliot and 50 lbs. charge, would not penetrate it at any distance over 100 

 yards. This vessel, therefore, could pass batteries so armed without suffering, 

 except by "racking." 



The Warrior. — The only steel shot which have been fired at the ' Warrior ' 

 target have been from 100-pouuder and 68-pounder smooth-bore guns, and 

 the 7-inch rifled gun, and 6-3 and 5-inch rifled guns. We sec from the 

 Table that the 7-inch rifled gun is capable of piercing the side of this vessel 

 vnth a 100-lb. shot and 20-lb. charge, the striking "work" being 1374 

 tons (round 1018). The effect of the 100-pounder gun would, therefore, be 

 represented by the proportion 



6-91: 1374:: 8-87: a-; 

 and a.'=1764. 



The force, therefore, required to send a steel shot from the 100-pounder 

 gun through the ' Warrior ' would be about 1764 tons ; and we may assume 

 that any force under this would not produce the required effect. 



Thus we find (round 972) that a shot from the lUO-pounder struck the 

 ' Warrior ' with a force of 1573 tons, but failed to penetrate. In the same 

 manner we can approximate to the force required to send a shot from the 

 9-22-inch gun through the ' Warrior,' 



6-91 : 1374 : : 9-14 : x ; 

 and .r=1813 tons. 



The 9-22-inch gun could therefore send a steel shot through the ' War- 

 rior,' provided the striking force were 1813 tons. 



If the shot, therefore, was 221 lbs. weight, the necessai-y velocity would 

 be 1087 feet ; and if the gun were fired -with its full charge of 44 lbs., it 

 woiild send an elongated steel shot of 221 lbs. through the ' Warrior ' at 

 2500 yards range. 



In the same manner, in the case of the 10-5-inch gun, we have the pro- 

 portion 



6-91: 1374:: 10-43: A-; 

 and .v=:2074. 



The 10-5-inch gun would therefore send its shot through the ' Warrior,' 

 provided the striking-force were 2074 tons. 



From this it appears that the ' Warrior ' is of weaker construction than 

 the ' Lord Warden,' as the 10-5-inch gun failed to penetrate the latter with 

 a striking-force of 2898 tons. 



In the case of the 15-inch American gun, we have the proportion 



6-91: 1374:: 14-85 :.^■; 

 and .r=2953 tons. 



From Table VIII. it appears that the 15-inch gun, fired with a spherical 

 steel shot of 484 lbs. and a charge of 50 lbs., would penetrate the ' Warrior ' 

 at any distance up to 500 yards, but would not do so at 1000 yards. 



In the case of the 11-inch gun, we have 



6-91 : 1374:: 10-85 :.r; 

 and .r=21o7. 



And from Table VIII. we find that the 11 -inch gun, fired with a solid steel 

 shot of 189 lbs. and charge of 20 lbs., would not penetrate the ' Warrior ' at 

 any range, not even if the muzzle of the gun were touching the armour plates. 



